High grade seamless steel tube

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Seamless pipe is a hollow section, no surrounding joint strip steel. The worldproduction of seamless pipe, a total of more than 5100 production plant more than 1850 companies in more than 110 countries under the production of oilpipe, which has more than 260 factory more than 170 companies in 44 countries under the.

Seamless tube with 1 structure (GB/T8162-2008) is used for seamless tubegeneral structure and mechanical structure.

Seamless pipe 2 fluid transport (GB/T8163-2008) is used for general seamless pipe conveying water, oil, gas and other fluid.

For low and medium pressure boiler seamless pipe 3 (GB3087-2008) is used in the manufacture of various structure of low and medium pressure boilersuperheated steam pipe, superheated steam pipe, boiling water pipe andlocomotive boiler flue tube, small pipe and brick arch tubes of high-quality carbon structural steel hot-rolled and cold drawn seamless pipe (rolling).

High pressure boiler seamless pipe with 4 (GB5310-2008) is used for heating surface tube boiler manufacturing high and higher pressure of high quality carbon steel, alloy steel and heat resisting stainless steel seamless pipe.

High pressure seamless tube with 5 chemical fertilizer equipment (GB6479-2000) is suitable for the work temperature of high quality carbon structural steel and alloy steel seamless tube of -40~400 DEG C, the working pressurefor chemical equipment and pipeline of 10~30Ma.

Seamless tube with 6 petroleum cracking (GB9948-2006) is applied to the oil refinery furnace tubes, heat exchangers and pipe seamless pipe.

Steel pipe 7 geological drilling (YB235-70) is for the Geological Department of the steel core drilling is used, according to use can be divided into the drill pipe, drill collar, core pipe, casing and sedimentation tubes.

Seamless tube with 8 diamond core drilling (GB3423-82) is used for seamlessdrill pipe, casing, Yan Xingan diamond core drilling.

9 oil drilling pipe (YB528-65) is used for seamless oil drilling internal upset ends or the outer thickening.

Seamless tube

Seamless tube

10 ships for carbon steel seamless pipe (GB5312-85)

China classification society rules for materials and welding -- ChineseClassification Society (CCS)

The Norway Classification Society (DNV) specification -- Norway Classification Society (DNV)

Lloyd's register of shipping (LR) specification -- British Lloyd's register of shipping (LR)

Germanischer Lloyd (GL) specification -- Germanischer Lloyd (GL)

American Bureau of shipping (ABS) specification - American Bureau of shipping (ABS)

Bureau Veritas (BV) specification - French Classification Society (BV)

The Italy Classification Society (RINA) specification, Italy Classification Society(RINA)

The Japanese classification society (NK) specification -- the Japaneseclassification society (NK)

The ship is making I level pressure piping, II level pressure piping, boiler and superheater for carbon steel seamless pipe. Carbon steel seamless pipe walltemperature does not exceed 450 degrees, alloy steel seamless pipe walltemperature more than 450 DEG C.

11 of automobile half shaft sleeve pipe seamless pipe (GB3088-82) is the manufacture of automobile half shaft sleeve and the driving bridge shell axis effective quality carbon structural steel and alloy structural steel hot-rolled seamless tube.

High pressure oil pipe with 12 diesel engine (GB3093-86) is a cold drawn seamless pipe manufacturing high-pressure diesel injection systems for.

With precision internal diameter seamless pipe 13 for hydraulic and pneumatic cylinder (GB8713-88) is the manufacture of hydraulic and pneumatic cylinderwith precision diameter with cold drawn or cold rolled precision seamless tube.

14 cold drawn or cold rolled precision seamless pipe (GB3639-83) is used fordimensional precision mechanical structure, hydraulic equipment, high and good surface finish of cold drawn or cold rolled precision seamless tube.Selection of precision seamless tube manufacturing mechanical or hydraulic equipment.

Stainless steel seamless tube with 15 structure (GB/T14975-2002) is widely used in chemical, petroleum, made of stainless steel hot-rolled textile, medical,food, machinery and other industrial anti-corrosion pipes and structural partsand components of a (extrusion, expansion) and cold drawing (rolling)seamless pipe.

Stainless steel seamless tube 16 fluid transport (GB/T14976-2002) is used for the transmission fluid made of stainless steel hot-rolled (extrusion, expansion)and cold drawing (rolling) seamless pipe.

17 special seamless tube is in addition to general seamless other cross section shapes of circular pipe outside the. According to the section of the steel pipe of different shapes and sizes can be divided into equal wall thickness of seamless pipe (codenamed D), unequal wall thickness of seamless pipe (codenamed BD), variable diameter special-shaped seamlesspipe (codenamed BJ). Shaped seamless pipe is widely used for variousstructural parts, tools and machinery parts.

Seamless steel tubes for 18 cryogenic pipe (GB/T18984-2003) is the use ofseamless steel tube for -45 to -195 DEG C low-temperature pressure vessellevel and low temperature heat exchanger tubes

General seamless tube is made with 10, 20, 30, 35 and 45 carbon steel 16Mnand 5MnV low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot-rolled or cold-rolled made. 10 and 20 low carbon steelseamless pipe is mainly used for fluid conveying pipeline. In 45, 40Cr in carbon steel seamless pipe used to make machine parts, such as automobile, tractorparts under stress. General seamless pipe to ensure the strength andflattening test. Hot rolled steel pipe in hot state or heat treatment delivery; cold with heat to heat treatment delivery. Seamless steel tubes for low and medium pressure boiler: used in the manufacture of a variety of low and medium pressure boiler, the superheated steam tube, boiling water pipe, superheated steam pipe, water wall tube and locomotive boiler flue tube, pipe and pipe arch bricks.

With high-quality carbon structural steel hot-rolled or cold-rolled seamless pipe(dial). Mainly used in 10, 20 steel manufacturing, in addition to ensure that the chemical composition and mechanical properties of the outer do pressure test,curling, flaring, flattening test. Hot rolled in hot state delivery, Leng Zha(allocated) to heat treatment delivery.


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Q:Welded and seamless steel pipe how to distinguish?
Different price:Because the production process of seamless steel tube is more complex, so the price is more expensive than a seamed steel pipe, and pipe joints mainly adopts steel (steel) two welded, fixed price, the most widely used are.
Q:What's the difference between hot dip galvanizing and cold galvanizing? Which kind of galvanizing method is good?
Cold galvanizing is zinc plating, the general surface is relatively smooth, no zinc flowers, there are two kinds of resistance to fingerprints and non - Fingerprint
Q:Can galvanized pipe be welded with seamless steel tube? What should I do to connect?
See the galvanized pipe and seamless steel pipe steel that differences in how if the difference is too large then the steel used for two kinds of materials for welding requirements is not the same, do not recommend direct welding, low pressure can be used in high voltage wire, welding on both sides of the same material flange with flange connection.
Q:D108*4 what does "D108" mean by seamless steel tubes? What does "*4" mean?
D108: refers to the outer diameter of 108mm;4: refers to the wall thickness of 4mm.
Q:What are the uses of welded steel pipes?
Low pressure fluid conveying galvanized steel tube (GB/T3091-1993) is also called galvanized pipe, commonly known as white tube. It is used for hot water, gas, air, oil, heating, steam, warm water and other generally low pressure fluid or other hot dip galvanizing (furnace welding or welding) steel pipe. The wall thickness of the steel pipe is divided into ordinary galvanized steel pipe and thick galvanized steel pipe. The end of the pipe is divided into non - threaded galvanized steel pipe and threaded galvanized steel pipe. The specification of steel pipe is expressed by nominal caliber (mm). The nominal diameter is the approximate value of the inner diameter. Usually used in inches, such as 11/2.
Q:What's the actual size of the DN25?
DN25 refers to the theoretical size of the inner hole of the pipe. That is to say, the theoretical dimension of the inner diameter of the pipe is 25 (the metric tube refers to the inner diameter, and the English tube is also to indicate the inner diameter, for example: 3/8, the inner diameter is 9.525, and the diameter of the 1/2 is 12.7, and the diameter of the 5/8 is 15.875). The outer diameter is theoretical in diameter, plus the wall thickness specified by the state (which is artificially specified and has no formula)The theoretical diameter of DN25 is 25, and the outer diameter is Phi 33.7 and phi 32(but there is also the outside diameter of the mark. The mark is: the outer diameter * wall thickness, such as: 32 * 2, that is to say, the outer diameter is 30, the inner diameter is 26)
Q:What quota is reserved for buried DN20 steel pipe?
If it is reserved for embedded pipe pre buried steel waterproof casing, set of waterproof casing steel production and installation is to set the quota items, if the outdoor installation of welded steel pipe buried steel casing pre quota items, if it is a reserved hole, then there is no need to set the quota items.
Q:What are the lengths of scaffold steel tubes?
Used to build scaffolding of steel pipes in general have two kinds, an outer diameter 48mm, wall thickness 3.5mm; another kind of outer diameter 51mm, wall thickness 3mm; according to its location and role of different, can be divided into vertical pole, horizontal rod, sweeping rod, etc.. According to the technical specification for construction of steel tubular scaffold with couplers, JGJ 130 - 2011[1]. The scaffolding steel pipe should be specified with the current national standard "GB/T13793" or "straight seam welded steel pipe welded steel pipe for low pressure liquid delivery" GB/T3091 Q235 ordinary steel pipe; steel pipe steel quality should meet the requirements of current national standard grade Q235 steel "carbon structural steel" in GB/T700. The scaffold pipe shall be made of a diameter of 48.3 * 3.6 steel tubes. The maximum mass of each steel tube shall not be greater than 25.8kg.
Q:What does "SC50" steel pipe mean in civil engineering?
In the production of T-shape welded steel pipe, the wrong edges happen frequently, and the influence factors are many. In production practice, steel pipe degradation is often caused by dry, wrong and side errors. Therefore, it is necessary to analyze the causes and preventive measures of spiral steel tubes.
Q:What steel pipes are buried for outdoor heating pipes? Seamless or welded tube? Are there any rules for specific countries? Can use the seamed tube?
Where outdoor heating pipes are buried, what steel pipe shall be referenced by the 11.1.2 code for installation of outdoor piping?:This chapter applies to the quality inspection and acceptance of the outdoor heating pipe network installation of the plant and the civil building group (residential area) with the saturation steam pressure not greater than 0.7MPa, and the hot water temperature not exceeding 130 degrees celsius.

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